EP 3752325 B1 20220309 - ROTARY-PERCUSSIVE HYDRAULIC DRILL PROVIDED WITH A CONTROL CHAMBER WHICH IS PERMANENTLY CONNECTED TO A LOW-PRESSURE ACCUMULATOR
Title (en)
ROTARY-PERCUSSIVE HYDRAULIC DRILL PROVIDED WITH A CONTROL CHAMBER WHICH IS PERMANENTLY CONNECTED TO A LOW-PRESSURE ACCUMULATOR
Title (de)
HYDRAULISCHER DREHSCHLAGBOHRER MIT EINER PERMANENT AN EINEM NIEDERDRUCKSPEICHER ANGESCHLOSSENEN STEUERKAMMER
Title (fr)
PERFORATEUR HYDRAULIQUE ROTO-PERCUTANT POURVU D'UNE CHAMBRE DE COMMANDE RELIÉE EN PERMANENCE À UN ACCUMULATEUR BASSE PRESSION
Publication
Application
Priority
- FR 1851249 A 20180214
- FR 2019050089 W 20190116
Abstract (en)
[origin: CA3088119A1] The rotary-percussive hydraulic drill (2) comprises a body (3); a fitting (15); a striking piston (5) configured to strike the fitting (15); an impact piston (13) having a front face (18) facing the fitting (15) and a rear face (19) facing a rear wall (21) of a cavity (14) which receives the impact piston; and a main hydraulic supply circuit comprising a high-pressure fluid supply line (9) and a low-pressure fluid return line (11). The body (3) and the impact piston (13) define a first control chamber (22) which is permanently connected to the high-pressure fluid supply line (9) and configured to urge the impact piston (13) forwards, and a second control chamber (25) which is configured to urge the impact piston (13) forwards and permanently connected to a low-pressure accumulator (26) which is connected to the low-pressure fluid return line (11).
IPC 8 full level
B25D 17/24 (2006.01); B25D 9/14 (2006.01); B25D 17/06 (2006.01); E21B 6/04 (2006.01)
CPC (source: EP KR US)
B25D 9/145 (2013.01 - EP KR US); B25D 9/26 (2013.01 - US); B25D 17/06 (2013.01 - EP KR US); B25D 17/24 (2013.01 - KR); B25D 17/245 (2013.01 - EP); E21B 6/04 (2013.01 - EP KR); B25D 2209/002 (2013.01 - EP KR US); B25D 2217/0019 (2013.01 - EP KR); B25D 2217/0023 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
FR 3077752 A1 20190816; FR 3077752 B1 20200131; AU 2019221107 A1 20200730; AU 2019221107 B2 20240404; CA 3088119 A1 20190822; CA 3088119 C 20240423; CN 111712353 A 20200925; CN 111712353 B 20230321; EP 3752325 A1 20201223; EP 3752325 B1 20220309; JP 2021513464 A 20210527; KR 20200120671 A 20201021; US 11724379 B2 20230815; US 2021001462 A1 20210107; WO 2019158834 A1 20190822; ZA 202005522 B 20210825
DOCDB simple family (application)
FR 1851249 A 20180214; AU 2019221107 A 20190116; CA 3088119 A 20190116; CN 201980011795 A 20190116; EP 19705982 A 20190116; FR 2019050089 W 20190116; JP 2020540771 A 20190116; KR 20207025775 A 20190116; US 201916969806 A 20190116; ZA 202005522 A 20200904